| Fly (Fu Lai) Aviation Ltd | Rochester | A rating |
| FLY EASILY TRAVEL LTD | Southall | A rating |
| FLY INTERNATIONAL TRADING LTD (Trading as Rose Empire) | Manchester | A rating |
| FLY SPORTS UK LTD | HARLOW | A rating |
| Fly Victor Limited | London | A rating |
| Flybird ltd | High wycombe | A rating |
| FLYDRY CLEANING SERVICES LIMITED | London | A rating |
| Flyford Store | Redditch | A rating |
| FlyForm Ltd | Cardiff | A rating |
| FLYINBIRD TRAVELS LTD | London | A rating |
| Flying Butler Apartments Limited | London | A rating |
| FLYING COLOURS CONSULTANCY LTD | Bristol | A rating |
| Flying Fat Sheep Design Ltd | Canterbury | A rating |
| Flying Fat Sheep Trading Co. Ltd | Canterbury | A rating |
| Flying Fish (North Wales) Ltd | Bangor | A rating |
| Flying Fish Seafoods Co Ltd | Indian Queens | A rating |
| Flying Fox Game | Woking | A rating |
| FLYING LOGISTICS AIR CARGO LTD. | West Drayton, | A rating |
| Flying Nimbus Limited | Pinner | A rating |
| Flying Point Management UK Ltd. | Reading | A rating |
| FLYING START DAY NURSERY CHIGWELL LTD | Chigwell | A rating |
| Flying Trade Limited | Harwich | A rating |
| Flylogix Holdings Limited | Lee on the Solent | A rating |
| Flynn Hodkinson Ltd | London | A rating |
| Flynn Interiors Limited | London | A rating |
| Flynn Management & Contractors (UK) Ltd | London | A rating |
| Flyp Homes Ltd | London | A rating |
| Flypop | Stansted | A rating |
| FLYTEC LTD | Derby | A rating |
| Flytex Ltd | Romford | A rating |
| Flyttr Limited | Oxon | A rating |
| FLYVUE LTD T/A FLYVUE TRAVEL | LONDON | A rating |
| Flywheel Operations Limited | North Finchley | A rating |
| Flywire Payments Limited | London | A rating |
| FM (CKAF) LTD T/A SUBWAY | AMERSHAM | A rating |
| FM Apparel Ltd | Manchester | A rating |
| Fm Care and Consultancy Limited | Ilford | A rating |
| FM Cladding & Roofing Ltd | Cookstown | A rating |
| FM CONSTRUCTION AND MAINTENANCE LTD | London | A rating |
| FM Conway Limited | Sevenoaks | A rating |
| FM Education Hub Limited | Barking | A rating |
| FM FINANCE LTD | Cheltenham | A rating |
| FM Insurance Europe S.A. UK Branch | Maidenhead | A rating |
| FM London LTD | Oadby | A rating |
| FM Motor Co. Ltd | Wembley | A rating |
| FM&ZM LTD | Barking | A rating |
| FMAP Limited | London | A rating |
| FMAS GROUP LIMITED | Blackburn | A rating |
| FMC Technologies Ltd | Dunfermline | A rating |
| FMCC Enterprise Ltd | Isleworth | A rating |
| FMCG Ltd T/A Mount Cash & Carry | Suffolk | A rating |
| FMCG SUPPLY LIMITED | Rainham | A rating |
| FMCG TRADING LTD | Alton | A rating |
| FMDC Ltd | Hertford | A rating |
| FMDM Foundation CIO | Godalming | A rating |
| FMJ Solutions Ltd | Twyford | A rating |
| FMR Investment Management (UK) Ltd | London | A rating |
| FMT Corporation Limited | Hounslow | A rating |
| FMZ Associates Ltd | Slough | A rating |
| FN Computers Ltd | Westcliff-on-Sea | A rating |
| FN Constructions Ltd | London | A rating |
| Fnality International Limited | London | A rating |
| Fnatic Ltd | London | A rating |
| FND Communications Ltd | Ilford | A rating |
| FNH HOTELS LIMITED | HEREFORD | A rating |
| FNH UK Ltd | Erith | A rating |
| FNM COLLECTION LTD | SLOUGH | A rating |
| FNS LEISURE GROUP LTD T/A THE RIVER GARDEN | HAREFIELD | A rating |
| FNS MARKETING LIMITED | London | A rating |
| FNT TEXTILE LTD | Leeds | A rating |
| Fnt.invest Ltd | Shrewsbury | A rating |
| FNV Ltd | Beckenham | A rating |
| FNZ (UK) Limited | Edinburgh | A rating |
| FO Foods Rubery Limited | Birmingham | A rating |
| Foam Engineers Ltd | High Wycombe | A rating |
| Foam Experts Ltd | Basildon | A rating |
| FOAT SOLUTIONS LTD | London | A rating |
| Focal Agent Ltd | London | A rating |
| Focal Care Limited T/as Caremark Barnsley | BARNSLEY | A rating |
| Focal Point Positioning | Cambridge | A rating |
| Focaldata Limited | London | A rating |
| Focchi Ltd | London | A rating |
| FOCUS 1ST ACADEMY LTD | Hatfield | A rating |
| Focus 4 U Limited | Shoreham-by-Sea | A rating |
| FOCUS ACCOUNTANTS LTD | Mitcham | A rating |
| Focus Agency Group Limited | London | A rating |
| Focus Auto Ltd | Mitcham | A rating |
| Focus Awards Limited | Rotherham | A rating |
| FOCUS BEAUTY SALON LIMITED | BROMLEY | A rating |
| Focus Building Services Limited | Bromley | A rating |
| Focus Building Solutions Limited | Pinner | A rating |
| Focus Business Management Limited | London | A rating |
| Focus Capital Managment and Investment ltd | London | A rating |
| Focus Care Link Limited | London | A rating |
| Focus Care Supported Living Ltd | Peterborough | A rating |
| Focus Caring Services Limited | Norwich | A rating |
| FOCUS CLOUD LIMITED | East Sussex | A rating |
| FOCUS DESIGN PARTNERSHIP LIMITED | BRISTOL | A rating |
| FOCUS EDUCATION GLOBAL PRIVATE LIMITED | BRENTFORD | A rating |
| FOCUS EVENTS MANAGEMENT LTD | London | A rating |
| Focus Finance and Marketing Ltd | Oldham | A rating |
| Focus Finder Limited | London | A rating |
| Focus Findings UK Limited | Dagenham | A rating |
| Focus Finsure Limited | Birmingham | A rating |
| Focus Home Care Limited | West Molesey | A rating |
| Focus Hotels Management Limited | Hatfield | A rating |
| FOCUS HOUSING LTD | Birmingham | A rating |
| Focus Legal Solutions Ltd | Brighton | A rating |
| Focus Medical Services Limited | Exeter | A rating |
| FOCUS MULTI SERVICES LTD | Southall | A rating |
| FOCUS PROPERTY SALES & MANAGEMENT LTD | Leicester | A rating |
| Focus SB Ltd | St.Leonards on Sea | A rating |
| FOCUS-ON-CARE LIMITED | BASINGSTOKE | A rating |
| Focused Equine Ltd | Pulborough | A rating |
| Focused Labs UK Ltd | Bristol | A rating |
| Focused Payroll | Liverpool | A rating |
| Focusrite Audio Engineering Limited | High Wycombe | A rating |
| FOCUSYNC UK LTD | London | A rating |
| FodaBox Limited | Welwyn Garden City | A rating |
| Fodderty Care Limited | By Dingwall | A rating |
| FOEL GRAPHICS LIMITED | Spilsby | A rating |
| Foers Engineering Ltd | Rothertham | A rating |
| FOGAP CONSULTING LTD | Leicester, England | A rating |
| FOI Industry Limited | Rochdale | A rating |
| Foilco Limited | Warrington | A rating |
| FOK TRADING LIMITED | London | A rating |
| Fold Consulting Engineers Limited | Bath | A rating |
| Foleshill Warehouse Limited | Coventry | A rating |
| Foley Park News | Maidstone | A rating |
| Folio Technologies Ltd | London | A rating |
| Folio3 Software UK | Woking | A rating |
| FOLIUM Food Science | Bristol | A rating |
| Folkes Worton LLP Chartered Accountants | Stourbridge | A rating |
| Folkestone Cricket Club | Folkestone | A rating |
| Folkestone Nursing Home Ltd | London | A rating |
| Folkestone Specsavers Ltd | Folkestone | A rating |
| Follett Care Ltd | Burgess Hill | A rating |
| FOLLETT HOMES LTD | CHICHESTER | A rating |
| FOLLION UK LIMITED | Leeds | A rating |
| FOLLIS HEALTHCARE LIMITED | GLOUCESTER | A rating |
| Follow Your Fire LTD | Cambridge | A rating |
| FollowApp Care Limited | London | A rating |
| Folly Bridge Brasserie Ltd | Oxford | A rating |
| Follylak Limited | South Ockendon | A rating |
| FOMO Models & Creative Ltd | London | A rating |
| Fomtech Ltd (Floww) | London | A rating |
| Fona Godema Ltd | Basildon | A rating |
| Fonab Castle Hotel Ltd | Pitlochry | A rating |
| Fonde Limited | Nottingham | A rating |
| Fondinfra Ltd | London | A rating |
| Fone Access Limited | Richmond | A rating |
| Fone Bazzar Ltd | Welling | A rating |
| Fone Care Ltd | Abingdon | A rating |
| Fone Care Wells Limited t/as iTech Andover | Andover | A rating |
| Fone Case Limited | Portsmouth | A rating |
| FONE CENTRE IT LIMITED | Fareham | A rating |
| FONE CHOICE (NW) LTD. | Crew, | A rating |
| Fone Choice Ltd | Bristol | A rating |
| FONE CLICK LIMITED | kirkcaldy | A rating |
| FONE CLINIK 2 LIMITED | Bristol | A rating |
| FONE FIX (NORTH) LTD | Edinburgh | A rating |
| FONE FIX 4U LTD | St. Helens | A rating |
| FONE GADGETS & ACCESSORIES LTD | Kingston Upon Thames | A rating |
| Fone Galaxy Limited | Royal Leamington Spa | A rating |
| FONE ITECH PVT LTD | Rhyl | A rating |
| FONE JUNCTION LTD | Tamworth | A rating |
| Fone Link Ltd | London | A rating |
| Fone M8 UK Ltd | London | A rating |
| Fone Market MCR Ltd | Salford | A rating |
| Fone Mart | Bognor Regis | A rating |
| FONE MART ALTON | England | A rating |
| Fone Star Limited | Hounslow | A rating |
| FONE STATION LTD | Aldershot | A rating |
| FONE STORE LTD/PHONE STORE | Widnes | A rating |
| FONE TECH COMMUNICATION LTD.T/As iTECH | High Wycombe | A rating |
| FONE TOWN LTD | Croydon | A rating |
| Fone Trends UK Ltd T/A Phone Trends | Morden | A rating |
| Fone Warehouse Ltd | Northants | A rating |
| FONE WIZE LTD | London | A rating |
| FONE WORLD TECH LTD | Chester | A rating |
| FONE WORLD UK LIMITED | Poole | A rating |
| FONE XPERTS LIMITED T/A FoneXperts | Ayr | A rating |
| Fone Xperts Sunderland Ltd T/A FoneXperts | Sunderland | A rating |
| FONE ZONE SOLUTIONS LIMITED | BELFAST | A rating |
| Fone-Central Ltd | London | A rating |
| Fonehut Ltd | Margate | A rating |
| Fonerevive Leigh Ltd | Leigh | A rating |
| FONES CLINIC SERVICES UK LIMITED | Manchester | A rating |
| FONES R US LIMITED | Slough | A rating |
| FONEWORLD4UK LTD | Hull | A rating |
| Fonex Ltd | High Wycombe | A rating |
| Fonezone Limited | Farnborough | A rating |
| Fonix Plc | London | A rating |
| Fonjock Social Work Practice Limited | Bury St. Edmunds | A rating |
| Fonlutions Ltd | Bristol | A rating |
| Fonoa Technologies UK Ltd | London | A rating |
| FONOLOGY LTD | Johnstone | A rating |
| Fontaine Limited | London | A rating |
| Fonterra (Logistics) Ltd | SWINDON | A rating |
| Fonteva EMEA Ltd | Richmond | A rating |